Composite material and preparation method thereof

The invention provides a preparation method of a magnesium-aluminum composite material, which comprises the following steps: respectively processing a magnesium alloy and an aluminum alloy into shapes of which at least one surfaces can be matched with each other in a concave-convex manner, assembling the surfaces of the magnesium alloy and the aluminum alloy which can be matched with each other in the concave-convex manner to obtain an extrusion blank, and preheating and extruding the assembled extrusion blank to obtain the magnesium-aluminum composite material. The magnesium/aluminum composite material with excellent bonding performance and mechanical performance is successfully prepared, and the problems that a single-component magnesium alloy plate is low in mechanical performance, poor in corrosion resistance and insufficient in surface coloring ability are solved. 本发明提供一种镁\铝复合材料的制备方法，通过分别将镁合金、铝合金加工成至少一个面可相互凹凸配合的形状，将镁合金、铝合金可相互凹凸配合的面装配，得到挤压坯料，再将装配得到的挤压坯料进行预热，挤压得到镁-铝复合材料。成功制备具有优异结合性能和力学性能的镁/铝复合材料，解决镁合金板单一组元